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<div id="overview"><a href="../../../../../../../../api/org/jboss/netty/handler/codec/http/websocketx/WebSocket08FrameDecoder.html">View Javadoc</a></div><pre>

<a class="jxr_linenumber" name="1" href="#1">1</a>   <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="2" href="#2">2</a>   <em class="jxr_comment"> * Copyright 2012 The Netty Project</em>
<a class="jxr_linenumber" name="3" href="#3">3</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="4" href="#4">4</a>   <em class="jxr_comment"> * The Netty Project licenses this file to you under the Apache License,</em>
<a class="jxr_linenumber" name="5" href="#5">5</a>   <em class="jxr_comment"> * version 2.0 (the "License"); you may not use this file except in compliance</em>
<a class="jxr_linenumber" name="6" href="#6">6</a>   <em class="jxr_comment"> * with the License. You may obtain a copy of the License at:</em>
<a class="jxr_linenumber" name="7" href="#7">7</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="8" href="#8">8</a>   <em class="jxr_comment"> *   <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
<a class="jxr_linenumber" name="9" href="#9">9</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="10" href="#10">10</a>  <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing, software</em>
<a class="jxr_linenumber" name="11" href="#11">11</a>  <em class="jxr_comment"> * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT</em>
<a class="jxr_linenumber" name="12" href="#12">12</a>  <em class="jxr_comment"> * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the</em>
<a class="jxr_linenumber" name="13" href="#13">13</a>  <em class="jxr_comment"> * License for the specific language governing permissions and limitations</em>
<a class="jxr_linenumber" name="14" href="#14">14</a>  <em class="jxr_comment"> * under the License.</em>
<a class="jxr_linenumber" name="15" href="#15">15</a>  <em class="jxr_comment"> */</em>
<a class="jxr_linenumber" name="16" href="#16">16</a>  <em class="jxr_comment">// (BSD License: http://www.opensource.org/licenses/bsd-license)</em>
<a class="jxr_linenumber" name="17" href="#17">17</a>  <em class="jxr_comment">//</em>
<a class="jxr_linenumber" name="18" href="#18">18</a>  <em class="jxr_comment">// Copyright (c) 2011, Joe Walnes and contributors</em>
<a class="jxr_linenumber" name="19" href="#19">19</a>  <em class="jxr_comment">// All rights reserved.</em>
<a class="jxr_linenumber" name="20" href="#20">20</a>  <em class="jxr_comment">//</em>
<a class="jxr_linenumber" name="21" href="#21">21</a>  <em class="jxr_comment">// Redistribution and use in source and binary forms, with or</em>
<a class="jxr_linenumber" name="22" href="#22">22</a>  <em class="jxr_comment">// without modification, are permitted provided that the</em>
<a class="jxr_linenumber" name="23" href="#23">23</a>  <em class="jxr_comment">// following conditions are met:</em>
<a class="jxr_linenumber" name="24" href="#24">24</a>  <em class="jxr_comment">//</em>
<a class="jxr_linenumber" name="25" href="#25">25</a>  <em class="jxr_comment">// * Redistributions of source code must retain the above</em>
<a class="jxr_linenumber" name="26" href="#26">26</a>  <em class="jxr_comment">// copyright notice, this list of conditions and the</em>
<a class="jxr_linenumber" name="27" href="#27">27</a>  <em class="jxr_comment">// following disclaimer.</em>
<a class="jxr_linenumber" name="28" href="#28">28</a>  <em class="jxr_comment">//</em>
<a class="jxr_linenumber" name="29" href="#29">29</a>  <em class="jxr_comment">// * Redistributions in binary form must reproduce the above</em>
<a class="jxr_linenumber" name="30" href="#30">30</a>  <em class="jxr_comment">// copyright notice, this list of conditions and the</em>
<a class="jxr_linenumber" name="31" href="#31">31</a>  <em class="jxr_comment">// following disclaimer in the documentation and/or other</em>
<a class="jxr_linenumber" name="32" href="#32">32</a>  <em class="jxr_comment">// materials provided with the distribution.</em>
<a class="jxr_linenumber" name="33" href="#33">33</a>  <em class="jxr_comment">//</em>
<a class="jxr_linenumber" name="34" href="#34">34</a>  <em class="jxr_comment">// * Neither the name of the Webbit nor the names of</em>
<a class="jxr_linenumber" name="35" href="#35">35</a>  <em class="jxr_comment">// its contributors may be used to endorse or promote products</em>
<a class="jxr_linenumber" name="36" href="#36">36</a>  <em class="jxr_comment">// derived from this software without specific prior written</em>
<a class="jxr_linenumber" name="37" href="#37">37</a>  <em class="jxr_comment">// permission.</em>
<a class="jxr_linenumber" name="38" href="#38">38</a>  <em class="jxr_comment">//</em>
<a class="jxr_linenumber" name="39" href="#39">39</a>  <em class="jxr_comment">// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND</em>
<a class="jxr_linenumber" name="40" href="#40">40</a>  <em class="jxr_comment">// CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,</em>
<a class="jxr_linenumber" name="41" href="#41">41</a>  <em class="jxr_comment">// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF</em>
<a class="jxr_linenumber" name="42" href="#42">42</a>  <em class="jxr_comment">// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE</em>
<a class="jxr_linenumber" name="43" href="#43">43</a>  <em class="jxr_comment">// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR</em>
<a class="jxr_linenumber" name="44" href="#44">44</a>  <em class="jxr_comment">// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,</em>
<a class="jxr_linenumber" name="45" href="#45">45</a>  <em class="jxr_comment">// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES</em>
<a class="jxr_linenumber" name="46" href="#46">46</a>  <em class="jxr_comment">// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE</em>
<a class="jxr_linenumber" name="47" href="#47">47</a>  <em class="jxr_comment">// GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR</em>
<a class="jxr_linenumber" name="48" href="#48">48</a>  <em class="jxr_comment">// BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF</em>
<a class="jxr_linenumber" name="49" href="#49">49</a>  <em class="jxr_comment">// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT</em>
<a class="jxr_linenumber" name="50" href="#50">50</a>  <em class="jxr_comment">// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT</em>
<a class="jxr_linenumber" name="51" href="#51">51</a>  <em class="jxr_comment">// OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE</em>
<a class="jxr_linenumber" name="52" href="#52">52</a>  <em class="jxr_comment">// POSSIBILITY OF SUCH DAMAGE.</em>
<a class="jxr_linenumber" name="53" href="#53">53</a>  
<a class="jxr_linenumber" name="54" href="#54">54</a>  <strong class="jxr_keyword">package</strong> org.jboss.netty.handler.codec.http.websocketx;
<a class="jxr_linenumber" name="55" href="#55">55</a>  
<a class="jxr_linenumber" name="56" href="#56">56</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.buffer.ChannelBuffer;
<a class="jxr_linenumber" name="57" href="#57">57</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.buffer.ChannelBuffers;
<a class="jxr_linenumber" name="58" href="#58">58</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.Channel;
<a class="jxr_linenumber" name="59" href="#59">59</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelFutureListener;
<a class="jxr_linenumber" name="60" href="#60">60</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelHandlerContext;
<a class="jxr_linenumber" name="61" href="#61">61</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.handler.codec.frame.CorruptedFrameException;
<a class="jxr_linenumber" name="62" href="#62">62</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.handler.codec.frame.TooLongFrameException;
<a class="jxr_linenumber" name="63" href="#63">63</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.handler.codec.replay.ReplayingDecoder;
<a class="jxr_linenumber" name="64" href="#64">64</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.logging.InternalLogger;
<a class="jxr_linenumber" name="65" href="#65">65</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.logging.InternalLoggerFactory;
<a class="jxr_linenumber" name="66" href="#66">66</a>  
<a class="jxr_linenumber" name="67" href="#67">67</a>  <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="68" href="#68">68</a>  <em class="jxr_javadoccomment"> * Decodes a web socket frame from wire protocol version 8 format. This code was forked from &lt;a</em>
<a class="jxr_linenumber" name="69" href="#69">69</a>  <em class="jxr_javadoccomment"> * href="https://github.com/joewalnes/webbit"&gt;webbit&lt;/a&gt; and modified.</em>
<a class="jxr_linenumber" name="70" href="#70">70</a>  <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="71" href="#71">71</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> WebSocket08FrameDecoder <strong class="jxr_keyword">extends</strong> ReplayingDecoder&lt;WebSocket08FrameDecoder.State&gt; {
<a class="jxr_linenumber" name="72" href="#72">72</a>  
<a class="jxr_linenumber" name="73" href="#73">73</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../../../org/jboss/netty/logging/InternalLogger.html">InternalLogger</a> logger = InternalLoggerFactory.getInstance(WebSocket08FrameDecoder.<strong class="jxr_keyword">class</strong>);
<a class="jxr_linenumber" name="74" href="#74">74</a>  
<a class="jxr_linenumber" name="75" href="#75">75</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> byte OPCODE_CONT = 0x0;
<a class="jxr_linenumber" name="76" href="#76">76</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> byte OPCODE_TEXT = 0x1;
<a class="jxr_linenumber" name="77" href="#77">77</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> byte OPCODE_BINARY = 0x2;
<a class="jxr_linenumber" name="78" href="#78">78</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> byte OPCODE_CLOSE = 0x8;
<a class="jxr_linenumber" name="79" href="#79">79</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> byte OPCODE_PING = 0x9;
<a class="jxr_linenumber" name="80" href="#80">80</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> byte OPCODE_PONG = 0xA;
<a class="jxr_linenumber" name="81" href="#81">81</a>  
<a class="jxr_linenumber" name="82" href="#82">82</a>      <strong class="jxr_keyword">private</strong> Utf8Validator utf8Validator;
<a class="jxr_linenumber" name="83" href="#83">83</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> fragmentedFramesCount;
<a class="jxr_linenumber" name="84" href="#84">84</a>  
<a class="jxr_linenumber" name="85" href="#85">85</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong> maxFramePayloadLength;
<a class="jxr_linenumber" name="86" href="#86">86</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">boolean</strong> frameFinalFlag;
<a class="jxr_linenumber" name="87" href="#87">87</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> frameRsv;
<a class="jxr_linenumber" name="88" href="#88">88</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> frameOpcode;
<a class="jxr_linenumber" name="89" href="#89">89</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">long</strong> framePayloadLength;
<a class="jxr_linenumber" name="90" href="#90">90</a>      <strong class="jxr_keyword">private</strong> <a href="../../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> framePayload;
<a class="jxr_linenumber" name="91" href="#91">91</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> framePayloadBytesRead;
<a class="jxr_linenumber" name="92" href="#92">92</a>      <strong class="jxr_keyword">private</strong> <a href="../../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> maskingKey;
<a class="jxr_linenumber" name="93" href="#93">93</a>  
<a class="jxr_linenumber" name="94" href="#94">94</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">boolean</strong> allowExtensions;
<a class="jxr_linenumber" name="95" href="#95">95</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">boolean</strong> maskedPayload;
<a class="jxr_linenumber" name="96" href="#96">96</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">boolean</strong> receivedClosingHandshake;
<a class="jxr_linenumber" name="97" href="#97">97</a>  
<a class="jxr_linenumber" name="98" href="#98">98</a>      <strong class="jxr_keyword">public</strong> enum <a href="../../../../../../../org/jboss/netty/handler/codec/http/websocketx/WebSocket08FrameDecoder.html">State</a> {
<a class="jxr_linenumber" name="99" href="#99">99</a>          FRAME_START, MASKING_KEY, PAYLOAD, CORRUPT
<a class="jxr_linenumber" name="100" href="#100">100</a>     }
<a class="jxr_linenumber" name="101" href="#101">101</a> 
<a class="jxr_linenumber" name="102" href="#102">102</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="103" href="#103">103</a> <em class="jxr_javadoccomment">     * Constructor with default values</em>
<a class="jxr_linenumber" name="104" href="#104">104</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="105" href="#105">105</a> <em class="jxr_javadoccomment">     * @param maskedPayload</em>
<a class="jxr_linenumber" name="106" href="#106">106</a> <em class="jxr_javadoccomment">     *            Web socket servers must set this to true processed incoming masked payload. Client implementations</em>
<a class="jxr_linenumber" name="107" href="#107">107</a> <em class="jxr_javadoccomment">     *            must set this to false.</em>
<a class="jxr_linenumber" name="108" href="#108">108</a> <em class="jxr_javadoccomment">     * @param allowExtensions</em>
<a class="jxr_linenumber" name="109" href="#109">109</a> <em class="jxr_javadoccomment">     *            Flag to allow reserved extension bits to be used or not</em>
<a class="jxr_linenumber" name="110" href="#110">110</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="111" href="#111">111</a>     <strong class="jxr_keyword">public</strong> WebSocket08FrameDecoder(<strong class="jxr_keyword">boolean</strong> maskedPayload, <strong class="jxr_keyword">boolean</strong> allowExtensions) {
<a class="jxr_linenumber" name="112" href="#112">112</a>         <strong class="jxr_keyword">this</strong>(maskedPayload, allowExtensions, Long.MAX_VALUE);
<a class="jxr_linenumber" name="113" href="#113">113</a>     }
<a class="jxr_linenumber" name="114" href="#114">114</a> 
<a class="jxr_linenumber" name="115" href="#115">115</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="116" href="#116">116</a> <em class="jxr_javadoccomment">     * Constructor</em>
<a class="jxr_linenumber" name="117" href="#117">117</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="118" href="#118">118</a> <em class="jxr_javadoccomment">     * @param maskedPayload</em>
<a class="jxr_linenumber" name="119" href="#119">119</a> <em class="jxr_javadoccomment">     *            Web socket servers must set this to true processed incoming masked payload. Client implementations</em>
<a class="jxr_linenumber" name="120" href="#120">120</a> <em class="jxr_javadoccomment">     *            must set this to false.</em>
<a class="jxr_linenumber" name="121" href="#121">121</a> <em class="jxr_javadoccomment">     * @param allowExtensions</em>
<a class="jxr_linenumber" name="122" href="#122">122</a> <em class="jxr_javadoccomment">     *            Flag to allow reserved extension bits to be used or not</em>
<a class="jxr_linenumber" name="123" href="#123">123</a> <em class="jxr_javadoccomment">     * @param maxFramePayloadLength</em>
<a class="jxr_linenumber" name="124" href="#124">124</a> <em class="jxr_javadoccomment">     *            Maximum length of a frame's payload. Setting this to an appropriate value for you application</em>
<a class="jxr_linenumber" name="125" href="#125">125</a> <em class="jxr_javadoccomment">     *            helps check for denial of services attacks.</em>
<a class="jxr_linenumber" name="126" href="#126">126</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="127" href="#127">127</a>     <strong class="jxr_keyword">public</strong> WebSocket08FrameDecoder(<strong class="jxr_keyword">boolean</strong> maskedPayload, <strong class="jxr_keyword">boolean</strong> allowExtensions, <strong class="jxr_keyword">long</strong> maxFramePayloadLength) {
<a class="jxr_linenumber" name="128" href="#128">128</a>         <strong class="jxr_keyword">super</strong>(State.FRAME_START);
<a class="jxr_linenumber" name="129" href="#129">129</a>         <strong class="jxr_keyword">this</strong>.maskedPayload = maskedPayload;
<a class="jxr_linenumber" name="130" href="#130">130</a>         <strong class="jxr_keyword">this</strong>.allowExtensions = allowExtensions;
<a class="jxr_linenumber" name="131" href="#131">131</a>         <strong class="jxr_keyword">this</strong>.maxFramePayloadLength = maxFramePayloadLength;
<a class="jxr_linenumber" name="132" href="#132">132</a>     }
<a class="jxr_linenumber" name="133" href="#133">133</a> 
<a class="jxr_linenumber" name="134" href="#134">134</a>     @Override
<a class="jxr_linenumber" name="135" href="#135">135</a>     <strong class="jxr_keyword">protected</strong> Object decode(<a href="../../../../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> ctx, <a href="../../../../../../../org/jboss/netty/channel/Channel.html">Channel</a> channel, <a href="../../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> buffer, <a href="../../../../../../../org/jboss/netty/handler/codec/http/websocketx/WebSocket08FrameDecoder.html">State</a> state)
<a class="jxr_linenumber" name="136" href="#136">136</a>             <strong class="jxr_keyword">throws</strong> Exception {
<a class="jxr_linenumber" name="137" href="#137">137</a> 
<a class="jxr_linenumber" name="138" href="#138">138</a>         <em class="jxr_comment">// Discard all data received if closing handshake was received before.</em>
<a class="jxr_linenumber" name="139" href="#139">139</a>         <strong class="jxr_keyword">if</strong> (receivedClosingHandshake) {
<a class="jxr_linenumber" name="140" href="#140">140</a>             buffer.skipBytes(actualReadableBytes());
<a class="jxr_linenumber" name="141" href="#141">141</a>             <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="142" href="#142">142</a>         }
<a class="jxr_linenumber" name="143" href="#143">143</a> 
<a class="jxr_linenumber" name="144" href="#144">144</a>         <strong class="jxr_keyword">switch</strong> (state) {
<a class="jxr_linenumber" name="145" href="#145">145</a>         <strong class="jxr_keyword">case</strong> FRAME_START:
<a class="jxr_linenumber" name="146" href="#146">146</a>             framePayloadBytesRead = 0;
<a class="jxr_linenumber" name="147" href="#147">147</a>             framePayloadLength = -1;
<a class="jxr_linenumber" name="148" href="#148">148</a>             framePayload = <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="149" href="#149">149</a> 
<a class="jxr_linenumber" name="150" href="#150">150</a>             <em class="jxr_comment">// FIN, RSV, OPCODE</em>
<a class="jxr_linenumber" name="151" href="#151">151</a>             byte b = buffer.readByte();
<a class="jxr_linenumber" name="152" href="#152">152</a>             frameFinalFlag = (b &amp; 0x80) != 0;
<a class="jxr_linenumber" name="153" href="#153">153</a>             frameRsv = (b &amp; 0x70) &gt;&gt; 4;
<a class="jxr_linenumber" name="154" href="#154">154</a>             frameOpcode = b &amp; 0x0F;
<a class="jxr_linenumber" name="155" href="#155">155</a> 
<a class="jxr_linenumber" name="156" href="#156">156</a>             <strong class="jxr_keyword">if</strong> (logger.isDebugEnabled()) {
<a class="jxr_linenumber" name="157" href="#157">157</a>                 logger.debug(<span class="jxr_string">"Decoding WebSocket Frame opCode="</span> + frameOpcode);
<a class="jxr_linenumber" name="158" href="#158">158</a>             }
<a class="jxr_linenumber" name="159" href="#159">159</a> 
<a class="jxr_linenumber" name="160" href="#160">160</a>             <em class="jxr_comment">// MASK, PAYLOAD LEN 1</em>
<a class="jxr_linenumber" name="161" href="#161">161</a>             b = buffer.readByte();
<a class="jxr_linenumber" name="162" href="#162">162</a>             <strong class="jxr_keyword">boolean</strong> frameMasked = (b &amp; 0x80) != 0;
<a class="jxr_linenumber" name="163" href="#163">163</a>             <strong class="jxr_keyword">int</strong> framePayloadLen1 = b &amp; 0x7F;
<a class="jxr_linenumber" name="164" href="#164">164</a> 
<a class="jxr_linenumber" name="165" href="#165">165</a>             <strong class="jxr_keyword">if</strong> (frameRsv != 0 &amp;&amp; !allowExtensions) {
<a class="jxr_linenumber" name="166" href="#166">166</a>                 protocolViolation(channel, <span class="jxr_string">"RSV != 0 and no extension negotiated, RSV:"</span> + frameRsv);
<a class="jxr_linenumber" name="167" href="#167">167</a>                 <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="168" href="#168">168</a>             }
<a class="jxr_linenumber" name="169" href="#169">169</a> 
<a class="jxr_linenumber" name="170" href="#170">170</a>             <strong class="jxr_keyword">if</strong> (maskedPayload &amp;&amp; !frameMasked) {
<a class="jxr_linenumber" name="171" href="#171">171</a>                 protocolViolation(channel, <span class="jxr_string">"unmasked client to server frame"</span>);
<a class="jxr_linenumber" name="172" href="#172">172</a>                 <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="173" href="#173">173</a>             }
<a class="jxr_linenumber" name="174" href="#174">174</a>             <strong class="jxr_keyword">if</strong> (frameOpcode &gt; 7) { <em class="jxr_comment">// control frame (have MSB in opcode set)</em>
<a class="jxr_linenumber" name="175" href="#175">175</a> 
<a class="jxr_linenumber" name="176" href="#176">176</a>                 <em class="jxr_comment">// control frames MUST NOT be fragmented</em>
<a class="jxr_linenumber" name="177" href="#177">177</a>                 <strong class="jxr_keyword">if</strong> (!frameFinalFlag) {
<a class="jxr_linenumber" name="178" href="#178">178</a>                     protocolViolation(channel, <span class="jxr_string">"fragmented control frame"</span>);
<a class="jxr_linenumber" name="179" href="#179">179</a>                     <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="180" href="#180">180</a>                 }
<a class="jxr_linenumber" name="181" href="#181">181</a> 
<a class="jxr_linenumber" name="182" href="#182">182</a>                 <em class="jxr_comment">// control frames MUST have payload 125 octets or less</em>
<a class="jxr_linenumber" name="183" href="#183">183</a>                 <strong class="jxr_keyword">if</strong> (framePayloadLen1 &gt; 125) {
<a class="jxr_linenumber" name="184" href="#184">184</a>                     protocolViolation(channel, <span class="jxr_string">"control frame with payload length &gt; 125 octets"</span>);
<a class="jxr_linenumber" name="185" href="#185">185</a>                     <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="186" href="#186">186</a>                 }
<a class="jxr_linenumber" name="187" href="#187">187</a> 
<a class="jxr_linenumber" name="188" href="#188">188</a>                 <em class="jxr_comment">// check for reserved control frame opcodes</em>
<a class="jxr_linenumber" name="189" href="#189">189</a>                 <strong class="jxr_keyword">if</strong> (!(frameOpcode == OPCODE_CLOSE || frameOpcode == OPCODE_PING || frameOpcode == OPCODE_PONG)) {
<a class="jxr_linenumber" name="190" href="#190">190</a>                     protocolViolation(channel, <span class="jxr_string">"control frame using reserved opcode "</span> + frameOpcode);
<a class="jxr_linenumber" name="191" href="#191">191</a>                     <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="192" href="#192">192</a>                 }
<a class="jxr_linenumber" name="193" href="#193">193</a> 
<a class="jxr_linenumber" name="194" href="#194">194</a>                 <em class="jxr_comment">// close frame : if there is a body, the first two bytes of the</em>
<a class="jxr_linenumber" name="195" href="#195">195</a>                 <em class="jxr_comment">// body MUST be a 2-byte unsigned integer (in network byte</em>
<a class="jxr_linenumber" name="196" href="#196">196</a>                 <em class="jxr_comment">// order) representing a status code</em>
<a class="jxr_linenumber" name="197" href="#197">197</a>                 <strong class="jxr_keyword">if</strong> (frameOpcode == 8 &amp;&amp; framePayloadLen1 == 1) {
<a class="jxr_linenumber" name="198" href="#198">198</a>                     protocolViolation(channel, <span class="jxr_string">"received close control frame with payload len 1"</span>);
<a class="jxr_linenumber" name="199" href="#199">199</a>                     <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="200" href="#200">200</a>                 }
<a class="jxr_linenumber" name="201" href="#201">201</a>             } <strong class="jxr_keyword">else</strong> { <em class="jxr_comment">// data frame</em>
<a class="jxr_linenumber" name="202" href="#202">202</a>                 <em class="jxr_comment">// check for reserved data frame opcodes</em>
<a class="jxr_linenumber" name="203" href="#203">203</a>                 <strong class="jxr_keyword">if</strong> (!(frameOpcode == OPCODE_CONT || frameOpcode == OPCODE_TEXT || frameOpcode == OPCODE_BINARY)) {
<a class="jxr_linenumber" name="204" href="#204">204</a>                     protocolViolation(channel, <span class="jxr_string">"data frame using reserved opcode "</span> + frameOpcode);
<a class="jxr_linenumber" name="205" href="#205">205</a>                     <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="206" href="#206">206</a>                 }
<a class="jxr_linenumber" name="207" href="#207">207</a> 
<a class="jxr_linenumber" name="208" href="#208">208</a>                 <em class="jxr_comment">// check opcode vs message fragmentation state 1/2</em>
<a class="jxr_linenumber" name="209" href="#209">209</a>                 <strong class="jxr_keyword">if</strong> (fragmentedFramesCount == 0 &amp;&amp; frameOpcode == OPCODE_CONT) {
<a class="jxr_linenumber" name="210" href="#210">210</a>                     protocolViolation(channel, <span class="jxr_string">"received continuation data frame outside fragmented message"</span>);
<a class="jxr_linenumber" name="211" href="#211">211</a>                     <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="212" href="#212">212</a>                 }
<a class="jxr_linenumber" name="213" href="#213">213</a> 
<a class="jxr_linenumber" name="214" href="#214">214</a>                 <em class="jxr_comment">// check opcode vs message fragmentation state 2/2</em>
<a class="jxr_linenumber" name="215" href="#215">215</a>                 <strong class="jxr_keyword">if</strong> (fragmentedFramesCount != 0 &amp;&amp; frameOpcode != OPCODE_CONT &amp;&amp; frameOpcode != OPCODE_PING) {
<a class="jxr_linenumber" name="216" href="#216">216</a>                     protocolViolation(channel, <span class="jxr_string">"received non-continuation data frame while inside fragmented message"</span>);
<a class="jxr_linenumber" name="217" href="#217">217</a>                     <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="218" href="#218">218</a>                 }
<a class="jxr_linenumber" name="219" href="#219">219</a>             }
<a class="jxr_linenumber" name="220" href="#220">220</a> 
<a class="jxr_linenumber" name="221" href="#221">221</a>             <em class="jxr_comment">// Read frame payload length</em>
<a class="jxr_linenumber" name="222" href="#222">222</a>             <strong class="jxr_keyword">if</strong> (framePayloadLen1 == 126) {
<a class="jxr_linenumber" name="223" href="#223">223</a>                 framePayloadLength = buffer.readUnsignedShort();
<a class="jxr_linenumber" name="224" href="#224">224</a>                 <strong class="jxr_keyword">if</strong> (framePayloadLength &lt; 126) {
<a class="jxr_linenumber" name="225" href="#225">225</a>                     protocolViolation(channel, <span class="jxr_string">"invalid data frame length (not using minimal length encoding)"</span>);
<a class="jxr_linenumber" name="226" href="#226">226</a>                     <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="227" href="#227">227</a>                 }
<a class="jxr_linenumber" name="228" href="#228">228</a>             } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (framePayloadLen1 == 127) {
<a class="jxr_linenumber" name="229" href="#229">229</a>                 framePayloadLength = buffer.readLong();
<a class="jxr_linenumber" name="230" href="#230">230</a>                 <em class="jxr_comment">// TODO: check if it's bigger than 0x7FFFFFFFFFFFFFFF, Maybe</em>
<a class="jxr_linenumber" name="231" href="#231">231</a>                 <em class="jxr_comment">// just check if it's negative?</em>
<a class="jxr_linenumber" name="232" href="#232">232</a> 
<a class="jxr_linenumber" name="233" href="#233">233</a>                 <strong class="jxr_keyword">if</strong> (framePayloadLength &lt; 65536) {
<a class="jxr_linenumber" name="234" href="#234">234</a>                     protocolViolation(channel, <span class="jxr_string">"invalid data frame length (not using minimal length encoding)"</span>);
<a class="jxr_linenumber" name="235" href="#235">235</a>                     <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="236" href="#236">236</a>                 }
<a class="jxr_linenumber" name="237" href="#237">237</a>             } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="238" href="#238">238</a>                 framePayloadLength = framePayloadLen1;
<a class="jxr_linenumber" name="239" href="#239">239</a>             }
<a class="jxr_linenumber" name="240" href="#240">240</a> 
<a class="jxr_linenumber" name="241" href="#241">241</a>             <strong class="jxr_keyword">if</strong> (framePayloadLength &gt; maxFramePayloadLength) {
<a class="jxr_linenumber" name="242" href="#242">242</a>                 protocolViolation(channel, <span class="jxr_string">"Max frame length of "</span> + maxFramePayloadLength + <span class="jxr_string">" has been exceeded."</span>);
<a class="jxr_linenumber" name="243" href="#243">243</a>                 <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="244" href="#244">244</a>             }
<a class="jxr_linenumber" name="245" href="#245">245</a>             <strong class="jxr_keyword">if</strong> (logger.isDebugEnabled()) {
<a class="jxr_linenumber" name="246" href="#246">246</a>                 logger.debug(<span class="jxr_string">"Decoding WebSocket Frame length="</span> + framePayloadLength);
<a class="jxr_linenumber" name="247" href="#247">247</a>             }
<a class="jxr_linenumber" name="248" href="#248">248</a> 
<a class="jxr_linenumber" name="249" href="#249">249</a>             checkpoint(State.MASKING_KEY);
<a class="jxr_linenumber" name="250" href="#250">250</a>         <strong class="jxr_keyword">case</strong> MASKING_KEY:
<a class="jxr_linenumber" name="251" href="#251">251</a>             <strong class="jxr_keyword">if</strong> (maskedPayload) {
<a class="jxr_linenumber" name="252" href="#252">252</a>                 maskingKey = buffer.readBytes(4);
<a class="jxr_linenumber" name="253" href="#253">253</a>             }
<a class="jxr_linenumber" name="254" href="#254">254</a>             checkpoint(State.PAYLOAD);
<a class="jxr_linenumber" name="255" href="#255">255</a>         <strong class="jxr_keyword">case</strong> PAYLOAD:
<a class="jxr_linenumber" name="256" href="#256">256</a>             <em class="jxr_comment">// Sometimes, the payload may not be delivered in 1 nice packet</em>
<a class="jxr_linenumber" name="257" href="#257">257</a>             <em class="jxr_comment">// We need to accumulate the data until we have it all</em>
<a class="jxr_linenumber" name="258" href="#258">258</a>             <strong class="jxr_keyword">int</strong> rbytes = actualReadableBytes();
<a class="jxr_linenumber" name="259" href="#259">259</a>             <a href="../../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> payloadBuffer = <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="260" href="#260">260</a> 
<a class="jxr_linenumber" name="261" href="#261">261</a>             <strong class="jxr_keyword">long</strong>  willHaveReadByteCount = framePayloadBytesRead + rbytes;
<a class="jxr_linenumber" name="262" href="#262">262</a>             <em class="jxr_comment">// logger.debug("Frame rbytes=" + rbytes + " willHaveReadByteCount="</em>
<a class="jxr_linenumber" name="263" href="#263">263</a>             <em class="jxr_comment">// + willHaveReadByteCount + " framePayloadLength=" +</em>
<a class="jxr_linenumber" name="264" href="#264">264</a>             <em class="jxr_comment">// framePayloadLength);</em>
<a class="jxr_linenumber" name="265" href="#265">265</a>             <strong class="jxr_keyword">if</strong> (willHaveReadByteCount == framePayloadLength) {
<a class="jxr_linenumber" name="266" href="#266">266</a>                 <em class="jxr_comment">// We have all our content so proceed to process</em>
<a class="jxr_linenumber" name="267" href="#267">267</a>                 payloadBuffer = buffer.readBytes(rbytes);
<a class="jxr_linenumber" name="268" href="#268">268</a>             } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (willHaveReadByteCount &lt; framePayloadLength) {
<a class="jxr_linenumber" name="269" href="#269">269</a>                 <em class="jxr_comment">// We don't have all our content so accumulate payload.</em>
<a class="jxr_linenumber" name="270" href="#270">270</a>                 <em class="jxr_comment">// Returning null means we will get called back</em>
<a class="jxr_linenumber" name="271" href="#271">271</a>                 payloadBuffer = buffer.readBytes(rbytes);
<a class="jxr_linenumber" name="272" href="#272">272</a>                 <strong class="jxr_keyword">if</strong> (framePayload == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="273" href="#273">273</a>                     framePayload = channel.getConfig().getBufferFactory().getBuffer(toFrameLength(framePayloadLength));
<a class="jxr_linenumber" name="274" href="#274">274</a>                 }
<a class="jxr_linenumber" name="275" href="#275">275</a>                 framePayload.writeBytes(payloadBuffer);
<a class="jxr_linenumber" name="276" href="#276">276</a>                 framePayloadBytesRead += rbytes;
<a class="jxr_linenumber" name="277" href="#277">277</a> 
<a class="jxr_linenumber" name="278" href="#278">278</a>                 <em class="jxr_comment">// Return null to wait for more bytes to arrive</em>
<a class="jxr_linenumber" name="279" href="#279">279</a>                 <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="280" href="#280">280</a>             } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (willHaveReadByteCount &gt; framePayloadLength) {
<a class="jxr_linenumber" name="281" href="#281">281</a>                 <em class="jxr_comment">// We have more than what we need so read up to the end of frame</em>
<a class="jxr_linenumber" name="282" href="#282">282</a>                 <em class="jxr_comment">// Leave the remainder in the buffer for next frame</em>
<a class="jxr_linenumber" name="283" href="#283">283</a>                 payloadBuffer = buffer.readBytes(toFrameLength(framePayloadLength - framePayloadBytesRead));
<a class="jxr_linenumber" name="284" href="#284">284</a>             }
<a class="jxr_linenumber" name="285" href="#285">285</a> 
<a class="jxr_linenumber" name="286" href="#286">286</a>             <em class="jxr_comment">// Now we have all the data, the next checkpoint must be the next</em>
<a class="jxr_linenumber" name="287" href="#287">287</a>             <em class="jxr_comment">// frame</em>
<a class="jxr_linenumber" name="288" href="#288">288</a>             checkpoint(State.FRAME_START);
<a class="jxr_linenumber" name="289" href="#289">289</a> 
<a class="jxr_linenumber" name="290" href="#290">290</a>             <em class="jxr_comment">// Take the data that we have in this packet</em>
<a class="jxr_linenumber" name="291" href="#291">291</a>             <strong class="jxr_keyword">if</strong> (framePayload == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="292" href="#292">292</a>                 framePayload = payloadBuffer;
<a class="jxr_linenumber" name="293" href="#293">293</a>             } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="294" href="#294">294</a>                 framePayload.writeBytes(payloadBuffer);
<a class="jxr_linenumber" name="295" href="#295">295</a>             }
<a class="jxr_linenumber" name="296" href="#296">296</a> 
<a class="jxr_linenumber" name="297" href="#297">297</a>             <em class="jxr_comment">// Unmask data if needed</em>
<a class="jxr_linenumber" name="298" href="#298">298</a>             <strong class="jxr_keyword">if</strong> (maskedPayload) {
<a class="jxr_linenumber" name="299" href="#299">299</a>                 unmask(framePayload);
<a class="jxr_linenumber" name="300" href="#300">300</a>             }
<a class="jxr_linenumber" name="301" href="#301">301</a> 
<a class="jxr_linenumber" name="302" href="#302">302</a>             <em class="jxr_comment">// Processing ping/pong/close frames because they cannot be</em>
<a class="jxr_linenumber" name="303" href="#303">303</a>             <em class="jxr_comment">// fragmented</em>
<a class="jxr_linenumber" name="304" href="#304">304</a>             <strong class="jxr_keyword">if</strong> (frameOpcode == OPCODE_PING) {
<a class="jxr_linenumber" name="305" href="#305">305</a>                 <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../../../../org/jboss/netty/handler/codec/http/websocketx/PingWebSocketFrame.html">PingWebSocketFrame</a>(frameFinalFlag, frameRsv, framePayload);
<a class="jxr_linenumber" name="306" href="#306">306</a>             }
<a class="jxr_linenumber" name="307" href="#307">307</a>             <strong class="jxr_keyword">if</strong> (frameOpcode == OPCODE_PONG) {
<a class="jxr_linenumber" name="308" href="#308">308</a>                 <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../../../../org/jboss/netty/handler/codec/http/websocketx/PongWebSocketFrame.html">PongWebSocketFrame</a>(frameFinalFlag, frameRsv, framePayload);
<a class="jxr_linenumber" name="309" href="#309">309</a>             }
<a class="jxr_linenumber" name="310" href="#310">310</a>             <strong class="jxr_keyword">if</strong> (frameOpcode == OPCODE_CLOSE) {
<a class="jxr_linenumber" name="311" href="#311">311</a>                 checkCloseFrameBody(channel, framePayload);
<a class="jxr_linenumber" name="312" href="#312">312</a>                 receivedClosingHandshake = <strong class="jxr_keyword">true</strong>;
<a class="jxr_linenumber" name="313" href="#313">313</a>                 <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../../../../org/jboss/netty/handler/codec/http/websocketx/CloseWebSocketFrame.html">CloseWebSocketFrame</a>(frameFinalFlag, frameRsv, framePayload);
<a class="jxr_linenumber" name="314" href="#314">314</a>             }
<a class="jxr_linenumber" name="315" href="#315">315</a> 
<a class="jxr_linenumber" name="316" href="#316">316</a>             <em class="jxr_comment">// Processing for possible fragmented messages for text and binary</em>
<a class="jxr_linenumber" name="317" href="#317">317</a>             <em class="jxr_comment">// frames</em>
<a class="jxr_linenumber" name="318" href="#318">318</a>             <strong class="jxr_keyword">if</strong> (frameFinalFlag) {
<a class="jxr_linenumber" name="319" href="#319">319</a>                 <em class="jxr_comment">// Final frame of the sequence. Apparently ping frames are</em>
<a class="jxr_linenumber" name="320" href="#320">320</a>                 <em class="jxr_comment">// allowed in the middle of a fragmented message</em>
<a class="jxr_linenumber" name="321" href="#321">321</a>                 <strong class="jxr_keyword">if</strong> (frameOpcode != OPCODE_PING) {
<a class="jxr_linenumber" name="322" href="#322">322</a>                     fragmentedFramesCount = 0;
<a class="jxr_linenumber" name="323" href="#323">323</a> 
<a class="jxr_linenumber" name="324" href="#324">324</a>                     <em class="jxr_comment">// Check text for UTF8 correctness</em>
<a class="jxr_linenumber" name="325" href="#325">325</a>                     <strong class="jxr_keyword">if</strong> (frameOpcode == OPCODE_TEXT || (utf8Validator != <strong class="jxr_keyword">null</strong> &amp;&amp; utf8Validator.isChecking())) {
<a class="jxr_linenumber" name="326" href="#326">326</a>                         <em class="jxr_comment">// Check UTF-8 correctness for this payload</em>
<a class="jxr_linenumber" name="327" href="#327">327</a>                         checkUTF8String(channel, framePayload.array());
<a class="jxr_linenumber" name="328" href="#328">328</a> 
<a class="jxr_linenumber" name="329" href="#329">329</a>                         <em class="jxr_comment">// This does a second check to make sure UTF-8</em>
<a class="jxr_linenumber" name="330" href="#330">330</a>                         <em class="jxr_comment">// correctness for entire text message</em>
<a class="jxr_linenumber" name="331" href="#331">331</a>                         utf8Validator.finish();
<a class="jxr_linenumber" name="332" href="#332">332</a>                     }
<a class="jxr_linenumber" name="333" href="#333">333</a>                 }
<a class="jxr_linenumber" name="334" href="#334">334</a>             } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="335" href="#335">335</a>                 <em class="jxr_comment">// Not final frame so we can expect more frames in the</em>
<a class="jxr_linenumber" name="336" href="#336">336</a>                 <em class="jxr_comment">// fragmented sequence</em>
<a class="jxr_linenumber" name="337" href="#337">337</a>                 <strong class="jxr_keyword">if</strong> (fragmentedFramesCount == 0) {
<a class="jxr_linenumber" name="338" href="#338">338</a>                     <em class="jxr_comment">// First text or binary frame for a fragmented set</em>
<a class="jxr_linenumber" name="339" href="#339">339</a>                     <strong class="jxr_keyword">if</strong> (frameOpcode == OPCODE_TEXT) {
<a class="jxr_linenumber" name="340" href="#340">340</a>                         checkUTF8String(channel, framePayload.array());
<a class="jxr_linenumber" name="341" href="#341">341</a>                     }
<a class="jxr_linenumber" name="342" href="#342">342</a>                 } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="343" href="#343">343</a>                     <em class="jxr_comment">// Subsequent frames - only check if init frame is text</em>
<a class="jxr_linenumber" name="344" href="#344">344</a>                     <strong class="jxr_keyword">if</strong> (utf8Validator != <strong class="jxr_keyword">null</strong> &amp;&amp; utf8Validator.isChecking()) {
<a class="jxr_linenumber" name="345" href="#345">345</a>                         checkUTF8String(channel, framePayload.array());
<a class="jxr_linenumber" name="346" href="#346">346</a>                     }
<a class="jxr_linenumber" name="347" href="#347">347</a>                 }
<a class="jxr_linenumber" name="348" href="#348">348</a> 
<a class="jxr_linenumber" name="349" href="#349">349</a>                 <em class="jxr_comment">// Increment counter</em>
<a class="jxr_linenumber" name="350" href="#350">350</a>                 fragmentedFramesCount++;
<a class="jxr_linenumber" name="351" href="#351">351</a>             }
<a class="jxr_linenumber" name="352" href="#352">352</a> 
<a class="jxr_linenumber" name="353" href="#353">353</a>             <em class="jxr_comment">// Return the frame</em>
<a class="jxr_linenumber" name="354" href="#354">354</a>             <strong class="jxr_keyword">if</strong> (frameOpcode == OPCODE_TEXT) {
<a class="jxr_linenumber" name="355" href="#355">355</a>                 <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../../../../org/jboss/netty/handler/codec/http/websocketx/TextWebSocketFrame.html">TextWebSocketFrame</a>(frameFinalFlag, frameRsv, framePayload);
<a class="jxr_linenumber" name="356" href="#356">356</a>             } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (frameOpcode == OPCODE_BINARY) {
<a class="jxr_linenumber" name="357" href="#357">357</a>                 <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../../../../org/jboss/netty/handler/codec/http/websocketx/BinaryWebSocketFrame.html">BinaryWebSocketFrame</a>(frameFinalFlag, frameRsv, framePayload);
<a class="jxr_linenumber" name="358" href="#358">358</a>             } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (frameOpcode == OPCODE_CONT) {
<a class="jxr_linenumber" name="359" href="#359">359</a>                 <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../../../../org/jboss/netty/handler/codec/http/websocketx/ContinuationWebSocketFrame.html">ContinuationWebSocketFrame</a>(frameFinalFlag, frameRsv, framePayload);
<a class="jxr_linenumber" name="360" href="#360">360</a>             } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="361" href="#361">361</a>                 <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> UnsupportedOperationException(<span class="jxr_string">"Cannot decode web socket frame with opcode: "</span> + frameOpcode);
<a class="jxr_linenumber" name="362" href="#362">362</a>             }
<a class="jxr_linenumber" name="363" href="#363">363</a>         <strong class="jxr_keyword">case</strong> CORRUPT:
<a class="jxr_linenumber" name="364" href="#364">364</a>             <em class="jxr_comment">// If we don't keep reading Netty will throw an exception saying</em>
<a class="jxr_linenumber" name="365" href="#365">365</a>             <em class="jxr_comment">// we can't return null if no bytes read and state not changed.</em>
<a class="jxr_linenumber" name="366" href="#366">366</a>             buffer.readByte();
<a class="jxr_linenumber" name="367" href="#367">367</a>             <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="368" href="#368">368</a>         <strong class="jxr_keyword">default</strong>:
<a class="jxr_linenumber" name="369" href="#369">369</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> Error(<span class="jxr_string">"Shouldn't reach here."</span>);
<a class="jxr_linenumber" name="370" href="#370">370</a>         }
<a class="jxr_linenumber" name="371" href="#371">371</a>     }
<a class="jxr_linenumber" name="372" href="#372">372</a> 
<a class="jxr_linenumber" name="373" href="#373">373</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> unmask(<a href="../../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> frame) {
<a class="jxr_linenumber" name="374" href="#374">374</a>         byte[] bytes = frame.array();
<a class="jxr_linenumber" name="375" href="#375">375</a>         <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i &lt; bytes.length; i++) {
<a class="jxr_linenumber" name="376" href="#376">376</a>             frame.setByte(i, frame.getByte(i) ^ maskingKey.getByte(i % 4));
<a class="jxr_linenumber" name="377" href="#377">377</a>         }
<a class="jxr_linenumber" name="378" href="#378">378</a>     }
<a class="jxr_linenumber" name="379" href="#379">379</a> 
<a class="jxr_linenumber" name="380" href="#380">380</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> protocolViolation(<a href="../../../../../../../org/jboss/netty/channel/Channel.html">Channel</a> channel, String reason) <strong class="jxr_keyword">throws</strong> CorruptedFrameException {
<a class="jxr_linenumber" name="381" href="#381">381</a>         protocolViolation(channel, <strong class="jxr_keyword">new</strong> <a href="../../../../../../../org/jboss/netty/handler/codec/frame/CorruptedFrameException.html">CorruptedFrameException</a>(reason));
<a class="jxr_linenumber" name="382" href="#382">382</a>     }
<a class="jxr_linenumber" name="383" href="#383">383</a> 
<a class="jxr_linenumber" name="384" href="#384">384</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> protocolViolation(<a href="../../../../../../../org/jboss/netty/channel/Channel.html">Channel</a> channel, <a href="../../../../../../../org/jboss/netty/handler/codec/frame/CorruptedFrameException.html">CorruptedFrameException</a> ex) <strong class="jxr_keyword">throws</strong> CorruptedFrameException {
<a class="jxr_linenumber" name="385" href="#385">385</a>         checkpoint(State.CORRUPT);
<a class="jxr_linenumber" name="386" href="#386">386</a>         <strong class="jxr_keyword">if</strong> (channel.isConnected()) {
<a class="jxr_linenumber" name="387" href="#387">387</a>             channel.write(ChannelBuffers.EMPTY_BUFFER).addListener(ChannelFutureListener.CLOSE);
<a class="jxr_linenumber" name="388" href="#388">388</a>         }
<a class="jxr_linenumber" name="389" href="#389">389</a>         <strong class="jxr_keyword">throw</strong> ex;
<a class="jxr_linenumber" name="390" href="#390">390</a>     }
<a class="jxr_linenumber" name="391" href="#391">391</a> 
<a class="jxr_linenumber" name="392" href="#392">392</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">int</strong> toFrameLength(<strong class="jxr_keyword">long</strong> l) <strong class="jxr_keyword">throws</strong> TooLongFrameException {
<a class="jxr_linenumber" name="393" href="#393">393</a>         <strong class="jxr_keyword">if</strong> (l &gt; Integer.MAX_VALUE) {
<a class="jxr_linenumber" name="394" href="#394">394</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../../../../org/jboss/netty/handler/codec/frame/TooLongFrameException.html">TooLongFrameException</a>(<span class="jxr_string">"Length:"</span> + l);
<a class="jxr_linenumber" name="395" href="#395">395</a>         } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="396" href="#396">396</a>             <strong class="jxr_keyword">return</strong> (<strong class="jxr_keyword">int</strong>) l;
<a class="jxr_linenumber" name="397" href="#397">397</a>         }
<a class="jxr_linenumber" name="398" href="#398">398</a>     }
<a class="jxr_linenumber" name="399" href="#399">399</a> 
<a class="jxr_linenumber" name="400" href="#400">400</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> checkUTF8String(<a href="../../../../../../../org/jboss/netty/channel/Channel.html">Channel</a> channel, byte[] bytes) <strong class="jxr_keyword">throws</strong> CorruptedFrameException {
<a class="jxr_linenumber" name="401" href="#401">401</a>         <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="402" href="#402">402</a>             <strong class="jxr_keyword">if</strong> (utf8Validator == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="403" href="#403">403</a>                 utf8Validator = <strong class="jxr_keyword">new</strong> Utf8Validator();
<a class="jxr_linenumber" name="404" href="#404">404</a>             }
<a class="jxr_linenumber" name="405" href="#405">405</a>             utf8Validator.check(bytes);
<a class="jxr_linenumber" name="406" href="#406">406</a>         } <strong class="jxr_keyword">catch</strong> (CorruptedFrameException ex) {
<a class="jxr_linenumber" name="407" href="#407">407</a>             protocolViolation(channel, ex);
<a class="jxr_linenumber" name="408" href="#408">408</a>         }
<a class="jxr_linenumber" name="409" href="#409">409</a>     }
<a class="jxr_linenumber" name="410" href="#410">410</a> 
<a class="jxr_linenumber" name="411" href="#411">411</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">void</strong> checkCloseFrameBody(<a href="../../../../../../../org/jboss/netty/channel/Channel.html">Channel</a> channel, <a href="../../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> buffer) <strong class="jxr_keyword">throws</strong> CorruptedFrameException {
<a class="jxr_linenumber" name="412" href="#412">412</a>         <strong class="jxr_keyword">if</strong> (buffer == <strong class="jxr_keyword">null</strong> || buffer.capacity() == 0) {
<a class="jxr_linenumber" name="413" href="#413">413</a>             <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="414" href="#414">414</a>         }
<a class="jxr_linenumber" name="415" href="#415">415</a>         <strong class="jxr_keyword">if</strong> (buffer.capacity() == 1) {
<a class="jxr_linenumber" name="416" href="#416">416</a>             protocolViolation(channel, <span class="jxr_string">"Invalid close frame body"</span>);
<a class="jxr_linenumber" name="417" href="#417">417</a>         }
<a class="jxr_linenumber" name="418" href="#418">418</a> 
<a class="jxr_linenumber" name="419" href="#419">419</a>         <em class="jxr_comment">// Save reader index</em>
<a class="jxr_linenumber" name="420" href="#420">420</a>         <strong class="jxr_keyword">int</strong> idx = buffer.readerIndex();
<a class="jxr_linenumber" name="421" href="#421">421</a>         buffer.readerIndex(0);
<a class="jxr_linenumber" name="422" href="#422">422</a> 
<a class="jxr_linenumber" name="423" href="#423">423</a>         <em class="jxr_comment">// Must have 2 byte integer within the valid range</em>
<a class="jxr_linenumber" name="424" href="#424">424</a>         <strong class="jxr_keyword">int</strong> statusCode = buffer.readShort();
<a class="jxr_linenumber" name="425" href="#425">425</a>         <strong class="jxr_keyword">if</strong> (statusCode &gt;= 0 &amp;&amp; statusCode &lt;= 999 || statusCode &gt;= 1004 &amp;&amp; statusCode &lt;= 1006
<a class="jxr_linenumber" name="426" href="#426">426</a>                 || statusCode &gt;= 1012 &amp;&amp; statusCode &lt;= 2999) {
<a class="jxr_linenumber" name="427" href="#427">427</a>             protocolViolation(channel, <span class="jxr_string">"Invalid close frame status code: "</span> + statusCode);
<a class="jxr_linenumber" name="428" href="#428">428</a>         }
<a class="jxr_linenumber" name="429" href="#429">429</a> 
<a class="jxr_linenumber" name="430" href="#430">430</a>         <em class="jxr_comment">// May have UTF-8 message</em>
<a class="jxr_linenumber" name="431" href="#431">431</a>         <strong class="jxr_keyword">if</strong> (buffer.readableBytes() &gt; 0) {
<a class="jxr_linenumber" name="432" href="#432">432</a>             byte[] b = <strong class="jxr_keyword">new</strong> byte[buffer.readableBytes()];
<a class="jxr_linenumber" name="433" href="#433">433</a>             buffer.readBytes(b);
<a class="jxr_linenumber" name="434" href="#434">434</a>             <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="435" href="#435">435</a>                 Utf8Validator validator = <strong class="jxr_keyword">new</strong> Utf8Validator();
<a class="jxr_linenumber" name="436" href="#436">436</a>                 validator.check(b);
<a class="jxr_linenumber" name="437" href="#437">437</a>             } <strong class="jxr_keyword">catch</strong> (CorruptedFrameException ex) {
<a class="jxr_linenumber" name="438" href="#438">438</a>                 protocolViolation(channel, ex);
<a class="jxr_linenumber" name="439" href="#439">439</a>             }
<a class="jxr_linenumber" name="440" href="#440">440</a>         }
<a class="jxr_linenumber" name="441" href="#441">441</a> 
<a class="jxr_linenumber" name="442" href="#442">442</a>         <em class="jxr_comment">// Restore reader index</em>
<a class="jxr_linenumber" name="443" href="#443">443</a>         buffer.readerIndex(idx);
<a class="jxr_linenumber" name="444" href="#444">444</a>     }
<a class="jxr_linenumber" name="445" href="#445">445</a> }
</pre>
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